Silas Weir Mitchell joins 'Grimm' pilot

The project, which has been described as a "fantastical" police drama, is set in a world inhabited by characters from Grimm's Fairy Tales.

David Giuntoli has already joined the cast as Nick Burckhardt, a detective who begins to see humans as magical beasts.

According to Deadline, Mitchell has signed up to play Eddie Monroe, a reformed big bad wolf who has managed to override his murderous instincts through his diet and Pilates. Eddie ends up helping Nick with his cases.

Mitchell previously played Haywire in Prison Break and has also appeared in shows including 24, My Name Is Earl and Burn Notice.